Question

When iron reacts with oxygen, it forms iron oxide, or rust.

iron + oxygen iron oxide

If 112 g of iron combines with 24 g of oxygen, how much iron oxide is formed?
A.
112 g of iron oxide
B.
136 g of iron oxide
C.
24 g of iron oxide
D.
88 g of iron oxide

Answer 1

To determine how much iron oxide (rust) is formed when iron reacts with oxygen, we can use the principle of conservation of mass, which states that mass is neither created nor destroyed in a chemical reaction.

In this case, you start with 112 g of iron and 24 g of oxygen. The total mass of the reactants will equal the mass of the product (iron oxide).

Total mass of reactants:
- Mass of iron = 112 g
- Mass of oxygen = 24 g

Total mass of reactants = 112 g + 24 g = 136 g

Since iron oxide is the only product formed from this reaction, the mass of the iron oxide formed will be equal to the total mass of the reactants.

Therefore, the mass of iron oxide formed is **136 g**.

So the correct answer is:
**B. 136 g of iron oxide**.